こんな時間まで

until this late

→ こんな
phrase Rare #38,879
until this late Used to emphasize that the time is unusually late.
JA: こんな時間まで起きていたの?
EN: Were you up until this late?

なんでこんな時間まで起きてるの?

Why are you still up this late?

こんな時間まですみません

Sorry for keeping you up this late.

— オールド・ボーイ (2003)

ルイザから電話をもらったこんな時間までどこにいたの?

I got a call from Luisa. Where have you been all this time?

— 8 1/2 (1963)

こんな時間まで起きてる悪い子は誰だ〜?

Who’s the naughty one still awake at this hour?

こんな時間まで何してたの?

What have you been doing up until now?